Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Hunting > Long Range Hunting & Shooting

Long Range Hunting & Shooting Nightforce Optics


Reply

speed guess

 
LinkBack Thread Tools Display Modes
  #8  
Old 09-06-2011, 11:37 PM
Gold Member
 
Join Date: Sep 2010
Location: Coldwater michigan
Posts: 508
Re: speed guess

Every gun will be different though. What one gun can handle as safe pressure another one will be well under that load. I met a guy once that used 96gr of r-25 and a 180gr scirocco at 3400fps. I would think if your at 81557 psi you should be seeing deffinately signs of pressure. Another member on here states that your velocity will tell you where your pressure is, under a chrono. Can't really say, just play it safe and be cautious.
Reply With Quote
  #9  
Old 09-07-2011, 01:23 PM
Junior Member
 
Join Date: Aug 2011
Location: Corsicana,Tx
Posts: 19
Re: speed guess

My Christensen Arms .300 RUM with 180 gr scirrocco with 95.5 gr RE25 comes in at 2975 fps. 26" barrel
Reply With Quote
  #10  
Old 09-07-2011, 01:33 PM
Official LRH Sponsor
 
Join Date: May 2010
Location: Bozeman, MT
Posts: 386
Re: speed guess

Quote:
Originally Posted by meatyrem View Post
Every gun will be different though. What one gun can handle as safe pressure another one will be well under that load. I met a guy once that used 96gr of r-25 and a 180gr scirocco at 3400fps. I would think if your at 81557 psi you should be seeing deffinately signs of pressure. Another member on here states that your velocity will tell you where your pressure is, under a chrono. Can't really say, just play it safe and be cautious.
Please do not misunderstand my post to think that the velocity will determine pressure! That is NOT the case.

What I meant to convey is that each gun performs differently with a number of powder, brass, bullet, and primer combinations. A load that is not over pressure in one gun may be VERY over pressure in another simply because of the way the chamber was cut.

Alliant shows 180 grain bullet with RL 25 in a 300 RUM to perform at 3146 with the max load (94 grains) for THEIR test gun.

This was approved by their attorneys.

Remember that we are dealing with extremely deadly, controlled explosions right next to our heads.

Be very cautious when exceeding published load data.
__________________
The Tikka Performance Center Team
www.tikkashooters.com
www.tikkaperformance.com
Reply With Quote
  #11  
Old 09-07-2011, 01:35 PM
Official LRH Sponsor
 
Join Date: May 2010
Location: Bozeman, MT
Posts: 386
Re: speed guess

I should have added that Alliant's test gun was a 24" barrel as well.
__________________
The Tikka Performance Center Team
www.tikkashooters.com
www.tikkaperformance.com
Reply With Quote
  #12  
Old 09-07-2011, 01:46 PM
Platinum Member
 
Join Date: Feb 2011
Location: Halfway between Lubbock and Dallas
Posts: 5,136
Re: speed guess

Quote:
Originally Posted by j-man View Post
Please do not misunderstand my post to think that the velocity will determine pressure! That is NOT the case.

What I meant to convey is that each gun performs differently with a number of powder, brass, bullet, and primer combinations. A load that is not over pressure in one gun may be VERY over pressure in another simply because of the way the chamber was cut.

Alliant shows 180 grain bullet with RL 25 in a 300 RUM to perform at 3146 with the max load (94 grains) for THEIR test gun.

This was approved by their attorneys.

Remember that we are dealing with extremely deadly, controlled explosions right next to our heads.

Be very cautious when exceeding published load data.
Looking at the loads some people are posting flat scares the hell out of me.

Maximum velocity rarely produces ideal accuracy and it's just not worth the chances of damaging or worse blowing up your gun to push it a little harder.

I would definitely not want to be behind the weapon for some of these loads.

Exceeding max pressure by 20-30% is simply not responsible and sooner or later is going to have a really ugly result.

Let me echo what has been said.... . BE VERY CAREFUL GUYS!
__________________
Without the First and Second Amendments the rest of The Constitution is Meaningless.
Reply With Quote
  #13  
Old 09-07-2011, 11:34 PM
Gold Member
 
Join Date: Sep 2010
Location: Coldwater michigan
Posts: 508
Re: speed guess

Quote:
Originally Posted by j-man View Post
Please do not misunderstand my post to think that the velocity will determine pressure! That is NOT the case.

What I meant to convey is that each gun performs differently with a number of powder, brass, bullet, and primer combinations. A load that is not over pressure in one gun may be VERY over pressure in another simply because of the way the chamber was cut.

Alliant shows 180 grain bullet with RL 25 in a 300 RUM to perform at 3146 with the max load (94 grains) for THEIR test gun.

This was approved by their attorneys.

Remember that we are dealing with extremely deadly, controlled explosions right next to our heads.

Be very cautious when exceeding published load data.
J-man,
I didn't want you to think I was refering to you on that post, it was from a while ago. About another member. Sorry for the misunderstanding. I wasn't meaning to just disregard all other pressure indicators.
Reply With Quote
  #14  
Old 09-08-2011, 12:14 AM
Official LRH Sponsor
 
Join Date: May 2010
Location: Bozeman, MT
Posts: 386
Re: speed guess

Quote:
Originally Posted by meatyrem View Post
J-man,
I didn't want you to think I was refering to you on that post, it was from a while ago. About another member. Sorry for the misunderstanding. I wasn't meaning to just disregard all other pressure indicators.
No worries. I didn't want anyone to misunderstand my post and I realized that it could have been interpreted incorrectly which was the last thing anyone working with these pressures needs.

No hard feelings and a true appreciation for making me think about what I said more clearly.
__________________
The Tikka Performance Center Team
www.tikkashooters.com
www.tikkaperformance.com
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: speed guess
Thread Thread Starter Forum Replies Last Post
I guess I get no help here m.o.a.man Reloading 22 09-10-2012 07:12 AM
RL10X=speed,speed, and more speed! goodgrouper Reloading 9 01-16-2010 07:52 PM
Guess what! Tyler Kemp Long Range Hunting & Shooting 11 11-30-2009 11:18 PM
Guess Where Ian Has Been This Week? Dave King Long Range Scopes and Other Optics 2 07-19-2006 09:12 AM
Speed Goat Speed Hunt D.P. Long Range Hunting & Shooting 8 10-12-2005 02:15 AM


All times are GMT -5. The time now is 01:23 AM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC